Fastener and driving tool with retaining blade

Details Fastener and driving tool with retaining blade Fastener and driving tool with retaining blade

2007-01-23

2007-01-23

Shakeri, Hadi (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S460000, C403S403000, C403S403000

Reexamination Certificate

active

10994920

ABSTRACT:
A combination fastener driver and fastener, the fastener driver including a generally hourglass-shaped tip which flares from the shank to the tip and the fastener includes a generally hourglass-shaped slot in the fastener head with under cut side walls. The flared walls of the driver tip engage the undercut side walls of the fastener slot to lock the tip in the slot when driving the fastener. A waist portion in the driver tip engages a waist portion in the fastener slot to prevent the tip from laterally slipping out of the slot during use.

REFERENCES:
patent: 2046837 (1936-07-01), Phillips
patent: 2304704 (1942-12-01), O'Leary
patent: 2954719 (1960-10-01), Vaughn
patent: 2994354 (1961-08-01), Vaughn
patent: 3540342 (1970-11-01), Vaughn
patent: 3695321 (1972-10-01), Garehime, Jr.
patent: 4538486 (1985-09-01), Lutrat
patent: 5347893 (1994-09-01), Mikic et al.
patent: 5498265 (1996-03-01), Asnis et al.
patent: 5868049 (1999-02-01), Kanwal

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